50409181 has 2 divisors, whose sum is σ = 50409182. Its totient is φ = 50409180.

The previous prime is 50409179. The next prime is 50409253. The reversal of 50409181 is 18190405.

It is a happy number.

50409181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46703556 + 3705625 = 6834^2 + 1925^2 .

It is a cyclic number.

It is not a de Polignac number, because 50409181 - 2¹ = 50409179 is a prime.

It is a super-2 number, since 2×50409181² = 5082171058181522, which contains 22 as substring.

Together with 50409179, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50409581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25204590 + 25204591.

It is an arithmetic number, because the mean of its divisors is an integer number (25204591).

Almost surely, 2^50409181 is an apocalyptic number.

It is an amenable number.

50409181 is a deficient number, since it is larger than the sum of its proper divisors (1).

50409181 is an equidigital number, since it uses as much as digits as its factorization.

50409181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 50409181 is about 7099.9423237094. The cubic root of 50409181 is about 369.4053779928.

Adding to 50409181 its reverse (18190405), we get a palindrome (68599586).

The spelling of 50409181 in words is "fifty million, four hundred nine thousand, one hundred eighty-one".